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ubuntucveUbuntu.comUB:CVE-2023-42822
HistorySep 27, 2023 - 12:00 a.m.

CVE-2023-42822

2023-09-2700:00:00
ubuntu.com
ubuntu.com
14
xrdp
vulnerability
font glyphs
out-of-bounds read
out-of-bounds write
privileged process
forking mode
upgrade

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.001

Percentile

30.5%

xrdp is an open source remote desktop protocol server. Access to the font
glyphs in xrdp_painter.c is not bounds-checked . Since some of this data is
controllable by the user, this can result in an out-of-bounds read within
the xrdp executable. The vulnerability allows an out-of-bounds read within
a potentially privileged process. On non-Debian platforms, xrdp tends to
run as root. Potentially an out-of-bounds write can follow the
out-of-bounds read. There is no denial-of-service impact, providing xrdp is
running in forking mode. This issue has been addressed in release 0.9.23.1.
Users are advised to upgrade. There are no known workarounds for this
vulnerability.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchxrdp< 0.9.5-2ubuntu0.1~esm2UNKNOWN
ubuntu20.04noarchxrdp< 0.9.12-1ubuntu0.1+esm1UNKNOWN
ubuntu22.04noarchxrdp< 0.9.17-2ubuntu2+esm1UNKNOWN
ubuntu24.04noarchxrdp< anyUNKNOWN
ubuntu14.04noarchxrdp< 0.6.0-1ubuntu0.1+esm3UNKNOWN
ubuntu16.04noarchxrdp< 0.6.1-2ubuntu0.3+esm3UNKNOWN

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.001

Percentile

30.5%